52975 Cyllarus
{{Use dmy dates|date=August 2021}}
{{Infobox planet
| minorplanet = yes
| name = 52975 Cyllarus
| symbol = 24px (astrological)
| background = #C7FF8F
| image = 52975 Cyllarus Hubble.jpg
| image_scale =
| caption = Hubble Space Telescope image of Cyllarus taken in 2010
| discoverer = N. Danzl
| discovery_site = Kitt Peak National Obs.
| discovered = 12 October 1998
| mpc_name = (52975) Cyllarus
| alt_names = {{mp|1998 TF|35}}
| pronounced = {{IPAc-en|ˈ|s|ɪ|l|ər|ə|s}}Noah Webster (1884) A Practical Dictionary of the English Language
| named_after = {{nowrap|Cyllarus {{small|(Greek mythology)}}}}
| mp_category = centaur {{·}}distant
| epoch = 4 September 2017 (JD 2458000.5)
| uncertainty = 4
| observation_arc = 9.95 yr (3,636 days)
| aphelion = 35.971 AU
| perihelion = 16.254 AU
| semimajor = 26.113 AU
| eccentricity = 0.3775
| period = 133.44 yr (48,739 days)
| mean_anomaly = 75.673°
| mean_motion = {{Deg2DMS|0.0074|sup=ms}} / day
| inclination = 12.651°
| asc_node = 52.073°
| arg_peri = 300.77°
| tisserand = 4.2470
| dimensions = {{val|62|ul=km}}
| rotation =
| spectral_type = RR
B–V = {{val|1.096|0.095}}
V–R = {{val|0.680|0.085}}
}}
52975 Cyllarus {{IPAc-en|ˈ|s|ɪ|l|ər|ə|s}} (provisional designation {{mp|1998 TF|35}}) is a very red centaur, approximately {{convert|62|km|mi|abbr=off|sigfig=2|sp=us}} in diameter, orbiting the Sun in the outer Solar System. It was discovered on 12 October 1998, by American astronomer Nichole Danzl at the Kitt Peak National Observatory near Sells, Arizona, in the United States. It was later named after the mythological centaur Cyllarus.
Orbit and classification
File:Cyllarus-Keck-Nov2009-mag23.gif at an apparent magnitude of 23]]
Cyllarus orbits the Sun in the outer main-belt at a distance of 16.3–36.0 AU once every 133 years and 5 months (48,739 days). Its orbit has an eccentricity of 0.38 and an inclination of 13° with respect to the ecliptic. Cyllarus came to perihelion in September 1989. The body's observation arc begins with its official discovery observation at Kitt Peak, as no precoveries were taken, and no prior identifications were made.
Naming
This minor planet was named for the Cyllarus, a centaur of Greek mythology. The official {{MoMP|52975|naming citation}} was published by the Minor Planet Center on 14 June 2003 ({{small|M.P.C. {{MoMP|52975|49102}}}}).
A symbol derived from that for 2060 Chiron, x14px, was devised in the late 1990s by German astrologer Robert von Heeren. It replaces Chiron's K with a CY for Cyllarus.{{cite web |id=L2/21-225 |title=Comment on U+26B7 CHIRON |date=26 August 2021 |first1=Kirk |last1=Miller |first2=Zane |last2=Stein |url=https://www.unicode.org/L2/L2021/21225-chiron-comment.pdf |access-date=23 December 2024 |archive-date=26 March 2023 |archive-url=https://web.archive.org/web/20230326025515/https://www.unicode.org/L2/L2021/21225-chiron-comment.pdf |url-status=live }}
Physical characteristics
As of 2017, no rotational lightcurve has been obtained from photometric observations. The body's rotation period and shape, as well as its spectral type remains unknown. Cyllarus measures approximately {{convert|62|km|mi|abbr=off|sigfig=2|sp=us}} in diameter, for an albedo of 0.115. It is a red centaur with (RR), and has an absolute magnitude of 9.4.
See also
- {{Section link|List of centaurs (small Solar System bodies)|52975}}
References
{{reflist|30em|refs=
|type = 2008-09-25 last obs.
|title = JPL Small-Body Database Browser: 52975 Cyllarus (1998 TF35)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2052975
|publisher = Jet Propulsion Laboratory
|access-date = 28 June 2017
|archive-date = 17 September 2020
|archive-url = https://web.archive.org/web/20200917134515/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2052975
|url-status = live
}}
|title = Dictionary of Minor Planet Names – Addendum to Fifth Edition: 2003–2005
|last = Schmadel | first = Lutz D.
|publisher = Springer Berlin Heidelberg
|chapter = (52975) Cyllarus [26.3, 0.38, 12.6]
|page = 217
|date = 2006
|isbn = 978-3-540-34361-5
|doi = 10.1007/978-3-540-34361-5_2577}}
|title = 52975 Cyllarus (1998 TF35)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=52975
|access-date= 25 April 2017}}
|title = MPC/MPO/MPS Archive
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|access-date = 25 April 2017
|archive-date = 7 October 2010
|archive-url = https://web.archive.org/web/20101007190852/https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|url-status = live
}}
|author = Marc W. Buie
|type = 2008-09-25 using 29 observations
|title = Orbit Fit and Astrometric record for 52975
|publisher = SwRI (Space Science Department)
|url = http://www.boulder.swri.edu/~buie/kbo/astrom/52975.html
|access-date = 2009-11-22
|archive-date = 9 March 2012
|archive-url = https://web.archive.org/web/20120309113832/http://www.boulder.swri.edu/~buie/kbo/astrom/52975.html
|url-status = live
}}
|title = AstDys (52975) Cyllarus Ephemerides
|publisher = Department of Mathematics, University of Pisa, Italy
|url = https://newton.spacedys.com/astdys/index.php?pc=1.1.3.0&n=52975
|access-date = 25 April 2017
|archive-date = 18 September 2020
|archive-url = https://web.archive.org/web/20200918154050/https://newton.spacedys.com/astdys/index.php?pc=1.1.3.0&n=52975
|url-status = live
}}
|title = List of Known Trans-Neptunian Objects
|work = Johnston's Archive
|date = 18 August 2020
|last = Johnston
|first = Wm. Robert
|url = http://www.johnstonsarchive.net/astro/tnoslist.html
|accessdate = 12 August 2021
|archive-date = 18 February 2007
|archive-url = https://web.archive.org/web/20070218170146/http://www.johnstonsarchive.net/astro/tnoslist.html
|url-status = live
}}
|first1 = O. R. |last1 = Hainaut
|first2 = H. |last2 = Boehnhardt
|first3 = S. |last3 = Protopapa
|date = October 2012
|title = Colours of minor bodies in the outer solar system. II. A statistical analysis revisited
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012A&A...546A.115H
|journal = Astronomy and Astrophysics
|volume = 546
|page = 20
|bibcode = 2012A&A...546A.115H
|doi = 10.1051/0004-6361/201219566
|arxiv = 1209.1896
|s2cid = 54776793
|access-date= 26 September 2019}}
}}
External links
- [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
- [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Observatoire de Genève, Raoul Behrend
- [https://www.minorplanetcenter.net/iau/lists/NumberedMPs050001.html Discovery Circumstances: Numbered Minor Planets (50001)-(55000)] – Minor Planet Center
- {{JPL small body|id=52975}}
{{Minor planets navigator| |number=52975| }}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:Cyllarus}}
Category:Centaurs (small Solar System bodies)